Box-covering machine



p 1929. J. T. ROBINSON El AL 1,727,562

BOX COVERING MACHINE Filed March 24, 1925 2 Sheets-Sheet 1 Fig-1 p 1 929. J. T. ROBINSON v|-:"r AL. 1,727,562

BOX COVERING MACHINE Filed March 24, 1925 2 Sheets-Sheet 2 Patented Sept. 10, 192 9 UNITED STATES 7 JOHN T. ROBINSON ANDGEORGE E. GO'ODING, or BOs'roN,- AS ACHUSET Ass oNoRs,

TO JOHN'T. ROBINSON COMPANY, OF sosromnassecnusarrs, A CORPORATION OF MASSACHUSETTS.

BOX-COVERING MACHINE.

Application filed March 24. 1925. Serial No. 17,897.

This invention relates to machines for cov-- erin boxes with paper or similar material and as for an Object to provide improved tension means for applying a proper tension to the covering material after it is drawn from the source of supply and before the adhesive is applied thereto.

Another object of the invention is to provide means in the adhesive applying mechanism for preventing the covering material from entering the'tankcontaining the adhesive to prevent the adhesive from being improperly applied to the covering material.

A furtherobject of the invention is to provide a vertically adjustable guide roll extension over which the web of covering material passes and by which its length may be increased or decreased to give the properset to the adhesive before the covering material is applied to "the box form. Convenient means are provided'whereby the vertical extension can be adjusted by the operator fromthe forward part of the machine.

The foregoing and other objects of the invention, together with means whereby the same may be carried into effect, will best be understood from the following description of one form or embodiment thereof illustrated in the accompanying drawings.

In saiddrawings:

a Fig. 1 is a side elevation of a bodying the invention. d

Fig. 2 is a fragmentary plan view of the tension means for the covering material.

Fig. 3 is a side elevation of a part of the mechanism shown in Fig. 2-showing one of the adjustable tension devices in operating position. I a I I Fig. 4 is a side elevation of the adhesive tank having one side thereof cut away to show the improved guard plates which prevent the strips of covering material from entering the adhesivetank.

Fig. 5 is a plan'view of the adhesive mechanism showninFig. 1. i

Fig. 6 is an elevation of the vertically adjustable guide roll extension. 2

' Referring toFig. 1, the machine as a whole comprises a frame consisting of a front standard 10, a rear standard 11, and abed portion machine em- 12 supported on the front andrear'standardsr Mounted upon the bed 12at the front and rear ends and ateach side are pedestals 13 at the top of which are supported two longitudinal bars 14. Thesebars project at the rear and have adj ustably' secured to the projecting portions apair of depending arms 15, 15 which carry at their lower ends a transverse shaft 16 adapted'tosupportone or more rolls 17 of paper orsimilar covering material.

Supported intermediate the bars 14 for-' wardly of the rolls 17 is a receptacle 18 for glue or othersuitable adhesive. This receptable has journalled in the top so as to extend down into the adhesive contained in the tank, a distributing roller 19 over which the paper or'other webs 20 from the rolls 17 pass. Suitable means, not shown, is provided for preventing the-roller 19 from turning in a direction at the top towards the rear of the machine, the forward rotation of the roll being obtained by the: movement of the strip 20 which passes thereover. c 1

Forward of the roller-19 is supported a scraping device generally "indicated at .21

.adapted tore'move the excess adhesive from s the underside ofthe webs 20, this device being. adjustable vertically of either or both ends of the scraper by the operator .at'the front of the machine bymovi'ng the-shafts 22 angularly the desired extent to raise the scraper at opposite ends equal or unequal amounts to causethe plate to properlybear against the paper webs and thereby remove the excess adhesive fromthe underside thereof.

Onthe forward. end of the bedplate 12 is secured an upright bracket 25 which supports the blademechanism by. which the web 20 is severed. This mechanism comprisesla fixed blade .26 suitably secured at the front upper edge of the bracket 25 and the bracket also includes journals for a transverse manually oscillatable shaft 27 upon which are mounted arms 28, 28 carrying a movable blade 29 which cooperates with thesaid fixedblade26.

. The box form-30 is mounted on a horizon-n tally and vertically adjustable supporting mechanism generally indicated at 31 and is power dr'iven'by' connections from an elec tric motor not shown. The covering material may consist ofa plurality of strips 20 led from separate rolls 17 mounted on the shaft 16 at the rear of the machine, said material being drawn to theforward part of the machine over and beneath a plurality of guiding rollers 32 to 43. As shown in Figs. land 2, the strips 20 as they are drawn from the rolls 17 pass under the guide roller 32 up andover the roller 33 and beneath the roller 34 to the upper part of the adhesive applying roller 19.

When the machine is'operating at highspeed andthe strips of covering material are drawn quickly through the machine by the rotation of the box form 30, the strips'2Q will pile up due to the uneven speed resulting from the irregular form of the box-form, to the stop? ping of the machine and other causes, the re-..

, sult being that the practical operation of the adhesive tank Band at a point adjacent the applied tothe box form. Inthe presentin stance there are threetension devices, one for each of the three strips of covering materialshown. The spring'members 47 aremade of upper edge thereof. Each ofthe collars 44 ias an adjustable thumb-screw 46 which is threaded inthe collar and engages the transverse supporting rod 45. The collars 44 are each provided with a flexible spring member 47 which is secured to the periphery of the collar and extends forwardly over the guide roller 33- As many of these tension devices are provided as thereare strips of material relatively light spring metal which permits them to be broughtto bear on the covering strips with at varying pressure as the stripspass. over the guide roller 33. In operation,

it is found, dne'either' to the difference in the materials from which the several strips may be made or to theirregularities in the construction and operation of the machine, that a different tension be necessary on the difierent'stri-ps of material. Accordingly the] machineprovidesforthis dilierence in tension through the medium of the independent tension devices eachof which may be adjust-' ed to apply the required amount of tension to the separate. strips of material I .1 As the strips of paperzleave the roller 33" they pass under the roller 34and up and over the adhesive applying roller 19, thence over the guide roller' 3 5i andbeneath the guide rollers '36" and I37",Qthe excess adhesive being scraped bytthe scraper 21 from the under side otthe strips20 ata point between'the guide I rollers 36 and'37. o

To prevent the'strips 20 from dropping into'the adhesive in the tank 18,. when in the operation of the machine the said strips bebetween the rear wall and the periphery of the adhesive roller 19.

The plates 49 and 50 are located beneath the, guide; rollers 35, 36 and 37 substantially closing the remainder of the opening in the adhesive tank with; the exception of the gap provided for the return of the adhesive scraped from the covering material by the scraping mechanism 21. It will thus be seen that the strips of coveringmaterial 20 are prevented at all points in their; passage through the adhesive applying mechanism 1 from dropping into the adhesive'and becoming improperly coated therewith. The plates 48, 49 and 50, are removably supported on pins 51 in the tank 18 to permit the same to be readily removed to. give access to the interior of the tank, and these pins are. posie tionedto support the plates in incllned relation to permit the excess adhesive material dropping on the plates to flow back into the reservoir 18.

After the paper strips 20 pass from the adhesive applying and scraping mechanism sufthe guide roller 39 is mounted on vertically adjustable mechanism, shown enlarged in Fig. 6, which will now be described;

. Two vertical supporting'rods-52 extend upwardly from the rods 14 and are provided at their upper ends with a cross member 53."

The roller 39 is mounted on a slidable carriage. 54 provided with lugs 55 which are guided on the rods 52. Ao'similar but smaller. guiding roller 56 is mounted on the carriage 54 above the roller 39 the strips 20 of covering material passing between the said rollers; The head 54 israised and lowered onthe vertical rods 52 by means'of a flexible cable 57 attachedtothe head 54-and passing upwardly through the cross member 53, over pulleys58:

and 59,and-then.ce downwardly'to a winch 60;

to which the end of the cable 57 is fastened and whichis adapted to wind the cable thereon. The winchGO is mounted on a longitudis nal, shaft 61 which extends forwardly, along the bed 12 to a point at the forward end of the machine. The forward end of the shaft 61 has a bevel gear 62 secured thereon which cooperates with a similar gear 63 mountedon a -shaft64,the latter being operated by a crank 65, the crank 65*being located in the convenient reach of the operator. Accordingly when it is found that the set which is being given to the adhesive applied to the strips 20 should be greater or less in amount, the crank 65 is turned to raise or lower the guide rollers 39 and 56 and thereby increase or diminish the length of the strips 20 from the adhesive applying mechanism to the point of application to the box form 30. The guide rollers 38 and 40 operate to guide the strip when the rollers 39 and 56 are lowered to a point below the rollers 38 and 40. The guide rollers 41, 42 and 43 complete the guiding of the strips 20 to the forward part of the machine at which point the said strips are severed by the severing mechanism.

What we claim is:

In a box covering machine, the combination with a frame, means at one end of said frame for supporting a roll of covering material, means for guiding a strip of the said material from said roll to the opposite end of said frame, mechanism in the latter part of said frame for severing the strip, means in the path of said strip for applying adhesive to the latter, said guiding means including a vertically adjustable roll and means for adjusting said roll comprising a bracket upon which said roll is mounted, vertical guide.

members for said bracket, and mechanism connected to said bracket and operable from a point adjacent said severing means for raising and lowering the same.

In testimony whereof we affix our signatures. v

JOHN T. ROBINSON. GEORGE E. GOOD-ING. 

